From The Penguin History Of Latin America, by Edwin Williamson (Penguin, 2003), Kindle pp. 441-443:
The election to the presidency of the Liberal Gerardo Machado in 1924 at first promised an end to the graft of the previous administration. Enjoying widespread popularity, Machado embarked on a programme of public works and measures to diversify the economy. But the fall in sugar prices of the late 1920s led him to repress strikes and protests, and when he got a controlled congress to grant him a further six-year term in 1928, he faced an explosion of anger from the student movement. As Machado’s rule became increasingly repressive, students and middle-class intellectuals took to violence and terrorism. The students formed a Directorio Estudiantil, which was to play a continuing oppositional role in the island’s politics. In 1931 there appeared a secret organization calling itself the ABC, whose members were young middle- and upper-class nationalists inspired by the Peruvian Haya de la Torre’s APRA movement. ABC pistoleros resorted to assassinations and shoot-outs in the streets with Machado’s brutal police. The unrest spread as labour unions joined the opposition to the dictator.
Reluctant to send in troops as in the past because of the nationalist agitation, Washington used its ambassador, Sumner Welles, to negotiate an end to Machado’s rule. But the nationalists resented Welles’s intervention and called a general strike in August 1933 (the Communist Party, fearing a US invasion, withdrew its support for the strike and tried to do a deal with Machado, which discredited it in the eyes of students and nationalists). Machado finally bowed to the pressure and went into exile. There followed an upsurge of revolutionary activity – occupations of factories and sugar mills by workers, looting of wealthy districts, and mob attacks on collaborators with the dictatorship.
The moderate government of Carlos Manuel de Céspedes, installed by the army in concert with Sumner Welles, was unable to control the situation. In September 1933 a revolt of non-commissioned officers – among whose leaders was a Sergeant Fulgencio Batista – unseated Céspedes and handed over power to a five-man committee chosen by the Directorio Estudiantil. The Havana students had succeeded in creating a nationalist revolution and, after some confusion, they chose one of their professors, the patrician Dr Ramón Grau San Martín, as provisional president. Workers now occupied sugar mills, in some cases demanding wage rises at gunpoint; strikes, riots and gun battles broke out all over the island. Grau’s government passed a number of radical measures, such as the expropriation of a small number of US-owned sugar mills, some redistribution of land, the limitation of the working day to eight hours, restrictions on the employment of cheap non-Cuban labour from other Caribbean islands and the extension of the franchise to women.
Still, the revolution of 1933 was primarily the work of student agitation and, apart from the expected hostility of the USA and the Cuban business community, it was opposed by the Communists, the ABC nationalists and by ousted army officers, who staged a number of revolts. Four months later Grau’s government was overthrown by a coup led by Fulgencio Batista, who effectively became the strongman of Cuba for the next decade, ruling at first through presidential stooges and then, from 1940, in his own right.
Batista was a military populist, a mulatto from a very humble background who had risen from the ranks and whose core constituency remained the enlisted men of the armed forces. As befitted a Latin American leader of the 1930s, he presented himself as a benefactor of the people, using the resources of the state for nationalist and redistributive ends. In 1934 the Platt Amendment was at last annulled, and a larger US quota for sugar helped raise production from the doldrums of the 1920s and early 1930s. Although Batista had the backing of US and Cuban business interests, he took steps to cultivate the trade unions, passing social welfare legislation, building houses for workers and creating employment through large public works programmes. A new labour confederation, controlled by a Communist leadership, was incorporated into the strongman’s political machine. In the countryside, Batista redistributed some land and, following the example of the Mexican Revolution, initiated a programme of rural education, often staffed by army personnel.
Dismayed by the failure of the 1933 revolution, the students and radical nationalists formed a new party in memory of José Martí, the Partido Revolucionario Cubano-Auténtico, which became the principal opposition to Batista. Terrorism continued to be a habitual feature of political life, but by the late 1930s Batista felt secure enough to permit elections for a constituent assembly. In 1940 a new nationalist, social-democratic constitution was passed by a Batista-dominated assembly, which included universal suffrage, state rights over the subsoil, state ‘orientation’ of the economy and labour rights such as a minimum wage, pensions, social insurance and an eight-hour day.
The constitution of 1940 ushered in a period of legitimate democratic governments, though there was no weakening of the Cuban tradition of political gangsterism and corruption. Batista won a clean election in 1940 and continued to implement his populist programme in the improved economic climate fostered by the war and the consequent US aid. Yet radical nationalism reasserted itself in 1944; Batista lost the election – having forborne from rigging it – to Dr Grau of the Auténticos, and retired to the USA a wealthy man.
Far Outliers 
